- hydrocyanite
- hydrocyanite Min.
(haɪdrəʊˈsaɪənaɪt)[Named 1870, f. Gr. ὕδωρ, ὑδρο- water + κύανος blue: see -ite.]Anhydrous sulphate of copper occurring in pale green crystals, which, when exposed to the air, absorb water and become bright blue.Dana Min. App. ii. 29.
Useful english dictionary. 2012.